Browse Prior Art Database

Detector Circuit

IP.com Disclosure Number: IPCOM000089125D
Original Publication Date: 1977-Sep-01
Included in the Prior Art Database: 2005-Mar-04
Document File: 2 page(s) / 37K

Publishing Venue

IBM

Related People

Aiken, LE: AUTHOR

Abstract

A detector circuit detects the small RMS increase in current caused by arcing between two closely spaced parts under test. The circuit ignores power-line frequency current flow caused by inherent capacitance and/or DC resistance of the insulation of the system under test.

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Detector Circuit

A detector circuit detects the small RMS increase in current caused by arcing between two closely spaced parts under test. The circuit ignores power-line frequency current flow caused by inherent capacitance and/or DC resistance of the insulation of the system under test.

Referring to the figure, a high potential source is connected between terminals 11 and 15, while the device under test is hooked to terminals 13 and
17. Two identical transformer primary windings 19, 21 are in series, with secondary windings 23, 25 arranged to cancel the induced output. The primary windings will have a high inductive reactance to the high frequency component when an arc occurs. The neon regulators 27 and the neon regulator 29 will conduct when an arc occurs, and the resultant 4:1 secondary potential is not cancelled. The secondary output is detected by the diode bridge 31, a DC amplifier 33 and a silicone controlled rectifier 35, providing a failure signal indication. Both the 12V DC supply and the high potential source are energized simultaneously to prevent a false failure indication upon turn on.

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